Off-pump HeartMate II Exchange in a Patient with Severe Lower Extremity Peripheral Artery Disease: A Case Report

Thrombosis of left ventricular assist device (LVAD) pumps is a serious complication that often requires exchange of the device. A 66-year-old man with severe peripheral vascular disease presented with pump thrombosis of the HeartMate II (HMII) LVAD 1.5 years after implantation. The HMII was exchanged to another HMII through a subcostal incision and without the use of cardiopulmonary bypass. For safety, the patient was prepared for cardiopulmonary bypass by exposing the right subclavian artery and insertion of a 5 FR cannula in the left common femoral vein. The pump was exchanged through a subcostal incision made over the LVAD pump pocket perpendicular to the costal margin. After deairing the pump and graft, LVAD support was resumed, postoperative course was uneventful, and the patient was discharged from the hospital four days later. Re-thrombosis, stroke, and right heart failure are frequent complications after LVAD exchange. Exchange through a subcostal incision with cardiopulmonary bypass backup appears to be safe

A Historical Review of Mechanical Circulatory Support

Meaningful and contemporary data regarding the clinical use of mechanical circulatory support (MCS) is founded on the work conducted in the 1950s when a “heart-lung” machine was incorporated to provide support during surgical interventions. Following this milestone, the need to support artificial circulation in patients with heart failure initiated an investigational and legislative collaboration to implement the mission-oriented Artificial Heart Program in the United States during the 1960s. In the subsequent decades, technological discoveries have integrated a series of mechanical systems employed as therapeutic options for short- and long-term artificial circulation in children and adults with advanced heart failure. Since their clinical application, MCS devices have been employed as a bridge to transplantation in over 4000 patients globally. In recent years, the adverse effects and economic burden of MCS have been counterbalanced by the harmonization of therapeutic protocols, the inclusion of multidisciplinary insight, and the allowance of families and patients to participate in shared decision making to address candidacy. In this chapter, we provide a review of the historical aspects of MCS, a therapeutic option for overcoming complexities encountered in reestablishing adequate hemodynamic states and providing a reasonable quality of life

Management of Patients with Refractory Cardiogenic Shock and Cardiointestinal Syndrome with Impella 5.5 as Bridge to Decision: Case Series

Patients with advanced heart failure require multi-system management as a majority succumb to end-organ dysfunction, including gastrointestinal sequelae. Temporizing measures, such as early mechanical circulatory support, can assist in the recovery of patients with acute cardiogenic shock. The temporary support can improve patient characteristics to enable future definitive heart failure therapies such as durable left ventricular assist devices and orthotopic heart transplantation. We present two cases of cardiogenic shock that were successfully bridged with an Impella 5.5 (Abiomed). The management enabled the patients to recover from reversible cardiointestinal syndrome and undergo successful definitive therapies

Implantation of Left Ventricular Assist Device in the setting of heavily calcified left ventricular apex using an apex preserving technique

A heavily calcified ventricular apex represents a challenging, rare and unique situation in LVAD implantation. A 44-year-old male was admitted with myocardial infarction. Left heart catheterization was complicated by episodes of ventricular fibrillation. After an acute stabilization with veno-arterial extracorporeal membrane oxygenation (VA-ECMO), an LVAD implantation was approved. Pre-operative work-up had shown a heavily calcified ventricular apex and an intraventricular thrombus, which was confirmed intraoperatively. To retain a viable ventricular geometry, the decision was made to preserve the calcified apex rather than to excise the entire calcified left ventricular aneurysm. Sutures for the inlet cannula were placed around the calcific apex (Apex Preserving) away from the core site, parachuting the inflow sewing ring into an intramyocardial position (Telescope) and assuring hemostasis by placing a felt strip on the epicardial tissue in a purse string fashion (Cerclage). The HeartMate II LVAD inflow cannula was secured into the sawing ring, and the rest of the procedure was conducted in the standardized fashion. The patient was discharged into a rehabilitation center eight weeks after LVAD implantation. Thus, if the calcific area is maintained by coring just the inflow site, the spherical shape of the ventricle is maintained to all for better positioning of the inlet cannula. The second suture line enhances hemostasis around the inflow insertion site and stays away from the calcium, which sits in a deeper layer. This procedure, the apex preserving cerclage technique (APCT), does not increase surgical time and reinforces the tissue around the inlet site

Feasibility of the use of a Stereoscopic Camera In the Final Inclusion (SCI-FI) of Donor Organ Assessment Using Virtual Reality Technology

Objective: Donor organ assessment is challenging, particularly when physicians and surgeons have to make decisions remotely. To improve communication and preparation for the transplant process, we proposed that a versatile, secure, and transportable video presence would enable a detailed assessment of donor organs. Methods: A virtual reality camera with a 360-degree visualization range was used with a smartphone receiver to enable integral assessment of the donor\u27s heart in the operating room, with visualization of the organs in real time. Prospective, observational data was collected in two cases in this proof-of-concept study. An assessment physician evaluated the donor heart remotely, and the assessment physician’s conclusions were compared to the transplanting surgeon. Results: The assessment physician was able to adjust the view, angle, contrast, and zoom of the images independently and deemed the organs suitable for transplant, which correlated in a blinded fashion with the procurement surgeon’s independent assessment. Discussion: Usage of 360-degree high definition cameras and real-time, three-dimensional mobile receivers may be a feasible approach to apply to organ procurement, allowing physicians located remotely from the procurement center to participate and assist in the final intraoperative assessment for organ acceptance

Regression of severe heart failure after combined left ventricular assist device placement and sleeve gastrectomy

Patients who suffer morbid obesity and heart failure (HF) present unique challenges. Two cases are described where concomitant use of laparoscopic sleeve gastrectomy (LSG) and left ventricular assist device (LVAD) placement enabled myocardial recovery and weight loss resulting in explantation. A 29-year-old male patient with a body mass index (BMI) of 59 kg/m2 and severe HF with a left ventricular ejection fraction (LVEF) of 20-25% underwent concomitant LSG and LVAD placement. Sixteen months after surgery, his BMI was reduced to 34 kg/m2 and his LVEF improved to 50-55%. A second 41-year-old male patient with a BMI of 44.8 kg/m2 with severe HF underwent the same procedures. Twenty-four months later, his BMI was 31.1 kg/m2 and his LVEF was 50-55%. In both cases, the LVAD was successfully explanted and patients remain asymptomatic. HF teams should consult and collaborate with bariatric experts to determine if LSG may improve the outcomes of their HF patients

Tracheostomy while on Extracorporeal Membrane Oxygenation: A Comparison of Percutaneous and Open Procedures

Although the ideal timing of tracheostomy for critically ill patients is controversial, transitioning from an endotracheal tube can be beneficial. Concerns arise for patients under extracorporeal membrane oxygenation (ECMO) support. Studies have described percutaneous and open tracheostomy approaches for critically ill patients but, to our knowledge, have not compared the two specifically in ECMO patients. This study analyzed safety and aimed to identify if there was a difference in major bleeding or other tracheostomy-associated complications. A single-center retrospective cohort study of all patients who received tracheostomy while on ECMO from July 2013 to May 2019 was completed. The primary endpoint was a significant difference in the incidence of a major bleeding adverse event at 48 hours. Secondary endpoints included differences in the incidence of complications (e.g., procedure-related mortality, ECMO decannulation, tracheal/esophageal injury, and pneumothorax/pneumomediastinum) and survival to discharge. A secondary analysis separated the groups further by comparing those with bleeding events and those without. The study included 27 ECMO patients: 16 (59%) in the percutaneous arm and 11 in the open arm. The median number of ECMO days before tracheostomy was 10 vs. 13, respectively. There were no statistically significant differences between the two groups for major bleeding events (percutaneous 44% vs. open 27%, p = .45), procedure-related mortality, or procedure-related complications. Both percutaneous and open tracheostomies in patients on ECMO require a multidisciplinary approach to minimize adverse effects. Major bleeding does occur, but there was no statistically significant correlation between bleeding events and the type of the tracheostomy approach. Thus, both open and percutaneous tracheostomy approaches have a favorable safety profile